Fluorescent carbon quantum dots (CQDs) rich in amine moieties that can be easily protonated under acidic conditions were electrostatically interacted with diblock copolymer poly[sodium(carboxylate sulfamate) isoprene]-b-poly(ethylene oxide) (CSS-IEO-3) possessing negatively charged sulfamate and carboxylate species on the CSS part of the diblock copolymer. The so-formed CQDs/CSS-IEO-3 material was found to be stable in a neutral and high salinity environment, which is critical when aiming for biological applications. Moreover, the photoluminescence of CQDs within CQDs/CSS-IEO-3, with emission at 420 nm upon excitation at 320 nm, was unaffected by pH and salinity changes, denoting the absence of significant aggregation phenomena and highlighting the potential of CQDs/CSS-IEO-3 for bioimaging. The photoluminescence of CQDs/CSS-IEO-3 was employed to develop a selective and sensitive method for the facile detection of Fe, in the presence of other metal salts, with a detection limit of 8.37 μM. Furthermore, integration of bovine serum albumin (BSA) furnished the three-component CQDs/CSS-IEO-3·BSA nanoensemble, without causing cytotoxicity when subjected to RKO human colon adenocarcinoma cell line. Evidently, confocal fluorescence microscopy allowed the imaging of CQDs/CSS-IEO-3·BSA within living cells, and illustrated its application potential for bioimaging and drug delivery.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/c7tb01352c | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Differential effects of warming on carbon budget, photosynthetic yield and biochemical composition of cold-temperate and Arctic isolates of Laminaria digitata (Phaeophyceae).
J Plant Physiol
January 2025
Department of Ecology, Faculty of Sciences, University of Málaga, Málaga, Spain.
Cold-temperate and Arctic hard bottom coastal ecosystems are dominated by kelp forests, which have a high biomass production and provide important ecosystem services, but are subject to change due to ocean warming. However, the photophysiological response to increasing temperature of ecologically relevant species, such as Laminaria digitata, might depend on the local thermal environment where the population has developed. Therefore, the effects of temperature on growth rate, biochemical composition, maximum quantum yield, photosynthetic quotient and carbon budget of young cultured sporophytes of Laminaria digitata from the Arctic at Spitsbergen (SPT; cultured at 4, 10 and 16 °C) and from the cold-temperate North Sea island of Helgoland (HLG; cultured at 10, 16 and 22 °C) were comparatively analyzed.
View Article and Find Full Text PDFExploring the luminescent and thermometric potentials of samarium(III) diketonate complexes with extended fluoroalkyl chains.
Dalton Trans
January 2025
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Leninsky Prospekt 53, 119991 Moscow, Russian Federation.
We synthesized and investigated a new series of Sm 1,3-diketonate complexes with CF-homologous thiophene-containing ligands. A clear correlation was found between the number of fluorine atoms in the 1,3-diketone's carbon chain and the luminescent properties of the samarium(III) complexes. The ligand modification method employed facilitates targeted and significant enhancements in the photoluminescence quantum yield (PLQY).
View Article and Find Full Text PDFCompSafeNano project: NanoInformatics approaches for safe-by-design nanomaterials.
Comput Struct Biotechnol J
December 2024
NovaMechanics Ltd, Nicosia 1070, Cyprus.
The CompSafeNano project, a Research and Innovation Staff Exchange (RISE) project funded under the European Union's Horizon 2020 program, aims to advance the safety and innovation potential of nanomaterials (NMs) by integrating cutting-edge nanoinformatics, computational modelling, and predictive toxicology to enable design of safer NMs at the earliest stage of materials development. The project leverages Safe-by-Design (SbD) principles to ensure the development of inherently safer NMs, enhancing both regulatory compliance and international collaboration. By building on established nanoinformatics frameworks, such as those developed in the H2020-funded projects NanoSolveIT and NanoCommons, CompSafeNano addresses critical challenges in nanosafety through development and integration of innovative methodologies, including advanced models, approaches including machine learning (ML) and artificial intelligence (AI)-driven predictive models and 1st-principles computational modelling of NMs properties, interactions and effects on living systems.
View Article and Find Full Text PDFSiO-Mediated Hydrothermal Synthesis of Spiroffite-Type CoTeO.
Inorg Chem
January 2025
Department of Chemistry, The Johns Hopkins University, Baltimore, Maryland 21218, United States.
The hydrothermal synthesis of novel materials typically relies on both knowledge of the redox activities of all cations present in the reaction solution and a small toolset of so-called mineralizers to tune the solution's overall chemical potential. Upon the use of a less conventional mineralizer species, SiO, we show the stabilization of spiroffite-type CoTeO under less forceful hydrothermal conditions than those in previous reports. When synthesized in the presence of both SiO and each respective alkali carbonate as a secondary mineralizer, silicon substitution in place of tellurium in the host structure becomes apparent, and the corresponding disorder introduced gives rise to enhanced low-temperature ferromagnetism.
View Article and Find Full Text PDFOptical properties and photobleaching of wildfire ashes aqueous extracts.
Environ Sci Process Impacts
January 2025
Department of Civil, Environmental and Architectural Engineering, University of Colorado at Boulder, Boulder, 80309, USA.
Wildfires can severely degrade soils and watersheds. Post-fire rain events can leach ashes and altered dissolved organic matter (DOM) into streams, impacting water quality and carbon biogeochemistry. The photochemical properties and persistence of DOM from wildfire ash leachates are not well understood.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!